Preparation of nano-scale nickel-tungsten catalysts by pH value control and application in hydrogenolysis of cellulose to polyols

Composition of the reaction products formed by hydrogenation of pyridine at 300 °C and 15 MPa in the presence of 15 sulphided and unsulphided molybdenum and tungsten catalysts promoted by cobalt and by nickel, respectively, using alumina as the support in most cases, has been examined. It has been proved that the catalyst composition affects both its hydrogenation activity and the ratio of transalkylation to cracking (or hydrocracking) reactions. Relations between the catalyst composition and its activity and selectivity found for the reaction of pyridine differ from those reported for hydrogenolytic cleavage of thiophene, hydrogenation and isomerization of cyclohexene.

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Hydrocracking of Tetralin on Supported Nickel–Tungsten Catalysts

Bulletin of the Chemical Society of Japan ◽

10.1246/bcsj.50.79 ◽

1977 ◽

Vol 50 (1) ◽

pp. 79-82 ◽

Cited By ~ 5

Author(s):

Shoko Yamadaya ◽

Masaaki Oba ◽

Yasuo Miki

Keyword(s):

Tungsten Catalysts ◽

Nickel Tungsten

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Hydrogenolysis of cellulose to valuable chemicals over activated carbon supported mono- and bimetallic nickel/tungsten catalysts

Green Chemistry ◽

10.1039/c4gc00664j ◽

2014 ◽

Vol 16 (7) ◽

pp. 3580-3588 ◽

Cited By ~ 46

Author(s):

Katarína Fabičovicová ◽

Oliver Malter ◽

Martin Lucas ◽

Peter Claus

Keyword(s):

Activated Carbon ◽

Tungsten Catalysts ◽

Nickel Tungsten

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Structural Changes of Sulfided Nickel-Tungsten Catalysts during Oxidative Regeneration.

Journal of The Japan Petroleum Institute ◽

10.1627/jpi1958.37.594 ◽

1994 ◽

Vol 37 (6) ◽

pp. 594-602 ◽

Cited By ~ 4

Author(s):

Nobuyuki MATSUBAYASHI ◽

Masaaki TAMAYAMA ◽

Hiromichi SHIMADA ◽

Toshio SATO ◽

Yuji YOSHIMURA ◽

...

Keyword(s):

Structural Changes ◽

Oxidative Regeneration ◽

Tungsten Catalysts ◽

Sulfided Nickel ◽

Nickel Tungsten

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Simultaneous Catalytic Reductions of NO and SO2by H2over Nickel-Tungsten Catalysts

The Journal of Physical Chemistry C ◽

10.1021/jp076400r ◽

2008 ◽

Vol 112 (9) ◽

pp. 3376-3382 ◽

Cited By ~ 11

Author(s):

Xuehui Li ◽

Peng Zhu ◽

Furong Wang ◽

Lefu Wang ◽

Shik Chi Tsang

Keyword(s):

Tungsten Catalysts ◽

Nickel Tungsten

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Surface Coating of TiO2 Powder

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.58.183 ◽

2008 ◽

Vol 58 ◽

pp. 183-189 ◽

Cited By ~ 1

Author(s):

Pei Xin Zhang ◽

Dong Yun Zhang ◽

Qi Qiu ◽

Li Jing ◽

Xiang Zhong Ren

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Surface Coating ◽

Ph Value ◽

Liquid Phase Deposition ◽

Tio2 Powder ◽

X Ray ◽

Tio2 Particles ◽

Nano Scale ◽

Transmission Electron

SiO2 nano-scale films were coated on the surface of TiO2 powder by liquid phase deposition. The morphology and the composition of coated TiO2 were studied by transmission electron microscopy (TEM), X-ray photoelectronic spectrscopy (XPS), and X-ray fluorescence (XRF). The study showed that a continuous SiO2 nano-scale film was coated on the TiO2 particles, and the element Si was bonded to the surface of TiO2 in the form of the Ti-O-Si bond. The most suitable conditions for coating are: 0.5 mol•L-1 of C ; pH value of 9.5; 200 g•L-1 of C , reaction time of 5 h at 85 °C.

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Hydrocracking of vacuum gas oil in the presence of supported nickel-tungsten catalysts

Kinetics and Catalysis ◽

10.1134/s0023158411030098 ◽

2011 ◽

Vol 52 (3) ◽

pp. 446-458 ◽

Cited By ~ 11

Author(s):

A. S. Ivanova ◽

E. V. Korneeva ◽

G. A. Bukhtiyarova ◽

A. L. Nuzhdin ◽

A. A. Budneva ◽

...

Keyword(s):

Vacuum Gas Oil ◽

Gas Oil ◽

Tungsten Catalysts ◽

Nickel Tungsten

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The Production of Liquid Fuel Products by the Catalytic Hydroliquefaction of Sapropels Using Nickel and Nickel-Tungsten Catalysts

Kataliz v promyshlennosti ◽

10.18412/1816-0387-2021-6-413-423 ◽

2021 ◽

Vol 21 (6) ◽

pp. 413-423

Author(s):

E. N. Terekhova ◽

O. B. Belskaya

Keyword(s):

Organic Matter ◽

Liquid Fuel ◽

Maximum Yield ◽

Ni Catalysts ◽

Renewable Sources ◽

Liquid Products ◽

Tungsten Catalysts ◽

Nickel Tungsten ◽

Supported Metal

Ni catalysts with the carbon-mineral supports obtained from sapropel were synthesized and studied in the catalytic hydroliquefaction of sapropel. It was found that catalysts with the supports obtained from mineral sapropel are more active as compared to those based on organic sapropel; therewith, bimetallic NiW catalysts showed a higher activity than monometallic nickel, irrespective of the support nature. The conversion of the organic matter of sapropel and the composition of liquid products are affected by both the features of supported metal and the composition of support. The liquid products of hydroliquefaction contain mostly the nitrogen- and oxygen-containing compounds. The maximum yield of С5-С21 hydrocarbons is achieved for the catalysts with the supports obtained from mineral sapropel. The composition of the liquid products of sapropel hydroliquefaction is similar to that of biofuels obtained from other renewable sources; such products can be introduced in the known schemes of further processing.

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